import React from 'react'
import {useNavigate} from 'react-router-dom'
export default function Header() {
  const navigate = useNavigate()
  function back() {
    navigate(-1)
  }
  function forward() {
    navigate(1)
  }
  return (
    <div className="page-header">
      <h2>React Router Demo</h2>
      <button onClick={back}>←后退</button>
      <button onClick={forward}>前进→</button>
    </div>
  )
}
